infiltrate

Plural: infiltrates

Verb

• cause (a liquid) to enter by penetrating the interstices
• enter a group or organization in order to spy on the members
  • "The student organization was infiltrated by a traitor"
• pass into or through by filtering or permeating
  • "the substance infiltrated the material"
• pass through an enemy line; in a military conflict
• To surreptitiously penetrate, enter or gain access to.
• To cause to penetrate in this way.
• To pass through something by filtration.
• To cause (a liquid) to pass through something by filtration.
• To invade or penetrate a tissue or organ.
• To send (soldiers, spies, etc.) through gaps in the enemy line.
• To move from a vein, remaining in the body.

Noun

• Any undesirable substance or group of cells that has made its way into part of the body.

Examples

• High-grade tumors often infiltrate surrounding structures.
• In certain conditions, immune cells may infiltrate into the cerebrospinal fluid.
• The agency infiltrated several spies into the company.
• The spy infiltrated the high-tech company and stole many secrets.

Synonyms

pass through, penetrate

Antonyms

exfiltrate